Typewriting machine



Patented Dec. 25, 1928.

warren STATES M I 1,696,236 Parent oFFrcE'.

WTDIJIAMFL BELMONT), OF HARTFORD, CONNECTICUT, ASSIGNOR' TO UNDERWOGD ELLIOTT FISH'EBBOTMPANY, NEW YORK, N. Y., A CORPORATION OF DELAW'ARE.

TYPEWRITING MACHINE.

Application: filedv July 3, 1926-. Serial No. 1%,351.

This invcntionrelatesto paper-fingers on typewriters for holding, the work upon. a rotary platen above the printing line.

Heretofore it has been the practice. to

swing a paper-finger out of the way to clear the leading edge of the work sheet.= However, according to this invention: there is practically unobstructed. insertion ofthe worksheet while the papei fingerv is in its effective position;

Another feature of this invention relates to the manner of constructing and assembling the pa er-finger, which ischeapened while its .useiulnessds increased; The fingen leis pivotally mounted, upon a bracket fast;

to. the carriage-frame and is held in engagement with the. platen, at a right angle thereto, by means-of aispringof special construction. Said spring; is effective to hold the papeufinger in both its effective and folded positions: llloreover the springwpenmitsin slight; movement of t the 1 aper-finger upwardlv to accommodate: shi tin of theplaten and also i to' permit: its deflection 1 when the worksheetis-inserted:

The paper-finger is preferably made of; a sheet inetal. strip, wider. at thesupporting point. and slightly; tapered; toward! the therec end thereof. Said; free: end-is provided;

with a loop contacting: with! the-platen at. one: point. The loop is. partly closed" at therear thereofandterminatesv with a downwardly extendingdeflecting} piece: which serves as atmeans to deviate or. direct: the

1 5 leading edge of the sheet between theloop.

and. the platen.v its supporting; end the papewfinger is providedrwith: a-doubleibend. through which. the supporting pivot is, pamedr Y I .m W'hen inserting at-stifi paperi'or a.-card. around the platen, the 1 leading edge thereofi engages the paper-finger. int a2 manner. to elevate its free end,--tl 1erebyincreasing the; deflecting. angle. of the guiding plate, and: n further facilitating. the introductionxof. the

sheet. under the'finger. ;However, after the leading edge passesthe finger the-spring-is strong enough to hold 1 the paper. against the platen. a v 7 Other features and advantages, will here'- inafter appear. v i r In the accompanying. drawings, Figure 1 is-a perspective View showing; the-.paper-finger in itseffective position.

Figure, 2; is at perspective View. showing;

the paper-finger in its folded or; ineffective position. v

Figure 3 is a cross-sectional view inclevation and shows the paper-finger asapplied to I an Underwood standard typewriting machine.

Figure 4 is a dismembered perspective View of the-linger, the operatingjspring, the sup orting bracket and the pivot screw.

T e Underwood paperrcarriage is provided with a front bar lOwhich together with end frames 11 and; a. rear bar, not shown, serves as means for rigidly support ing a platen l2rotatably mounted onia shaft 13. The platen is struck at the front thereof by. type-bars 14. l

A worksheet 15 is inserted at. the rearof the platen, over a rear table 1.6,.and the leading edge of the sheet is engaged by. feederolls l7" runningxonz the platen. The T5 platen is then rotated' to. position; the worksheet. to. the printing line.

The. leading edge. of: thefwork-sheet engages, at the center thereof, a papen-finger indicated generally by. the numeral 18. Ow inggto the. peculiar construction ofthe paper? finger and EtlSOltO:tll8 manner. of mounting thetsaine, the leading. edge of the; work-sheet is automatically guided under the finger. while the sameisinitseffective position; 7 55.

The finger is mounted on a pivot-screw 19* supported on a-.bracket.20' fast towthe-i bar 10, therbrackct being secured toqthe: bar-1 by. meansof a screw 21. Inorder that the" finger may be slightly deflected when .inserting. the work-sheet to' prevent; wrinkling of.- its leading-edge; there pivoted a spring"; 22 which. serves also as a=means for hold-- ing; the finger" in both its effective and incfiective. positions; as shown respectively) in Figures 1 2. HPhespring. is held; in. place by! meansof the screw 19 which passes througln an elongated hole. inxa tongue 25 bent over from the spring; and. islaterally located on thje bracket 20 by means of locating prongs or shoulders 23 ilIldQlI Thefinger islooselyr positioned between flanges. or prongs- 26 of the bracket 20, so asto permit movement thereof inall directions. To this end the; fingerpispror videdwith a U-shaped or reflexly bent sup; porting end 27, the lower part thereof. having; a. hole 28' for receiving, the screw The upper part of the supporting end27 is provided withan elongated hole 29 to permit upward movement of the finger when the same is engaged by the work-sheet, as shown in dot-and-dash lines in Figure 3.

In order to prevent wrinkling the worksheet when the leading edge thereof engages the finger 18, there is provided a deflectorplate 30 which conducts the work-sheet toward the platen. As shown in the drawings, the deflector plate forms an integral part of the finger and is a continuation of a. loop 31 which bears upon the platen. The outer end of the deflector-plate is bent upwardly at 32 and is soldered to the finger at 33. To facilitatethe swinging of the finger 18 to its effective orineifectivo position, a half loop 34 serving as a fingerpiece is provided which may be formed by bending the finger near its supporting end.

It will be understood that the finger may be left in its effective position during the insertion of a new sheet and need only be swung to its ineffective position in such cases as it may be desired to make erasureson the work-sheet or for any other reason.

Variations may be resorted to within the scope of the invention, and portions of the improvements may beused without others.

Having thus described my invention, I claim:

1. In a typewriting machine having a: shiftable platen and a carriage therefor, a folding paper-finger arranged to contact with the platen above the printing line, and means for resiliently mounting said paperfinger upon the carriage in a manner to permit shifting of the platen, said means including a l. 'acket fast to the carriage, a spring guided between prongs of said bracket, and a screw for holding the paper-finger in place when the same is in its folded position.

2. In a typewriting machine having a shiftable platen and a carriage therefor, a folding paper-finger arranged to contact with the platen above the printing line, and means for resiliently mounting said paperfinger upon the carriage in a manner to permit shifting of the platen, said means including a bracket secured to the carriage, a spring slidably mounted between the prongs of the bracket, means to guide said spring along said bracket-prongs against said finger, and a pivot secured upon said prongs to hold said finger in contact relation 6 with said spring in extended and in folded positions.

3. In a typewriting machine having a shiftable platen'and a non-shifting carriage therefor, a folding paper-finger arranged to contact with the platen above the printing line, and means for resiliently mounting said paper-finger upon the carriage in a manner to permit shifting of the platen, said means including a bracket having flanges and secured to the carriage, a spring mounted between the flanges of the bracket and provided with locating shoulders proectmg at the sides of said flanges, and a pivot-screw passing through said flanges and said finger beyond said spring.

f. In a typewritin g machine having a. shiftable platen and a non-shiftin g carriage there for, a folding paper-finger normally arranged to contact with the platen above the printing line, and means for resiliently i'nounting said paper-finger upon the carriage in amanner to permit shifting of the platen, said means including a bracket having flanges and secured to the carriage, a spring mounted between the flanges of said braclr'et, said finger having a reflex bend mounted be tween said flanges against said spring, and a pivot-screw passing through apertures in said bracket and said bend, the aperture of said bend in said finger being enlarged to permit rocking movement of said linger against said spring.

5. In a typewriting machine having a shiftable platen and a non-shifting carriage therefor, a folding paper-finger arranged to contact with the platen above the printing line, and means for resiliently mounting said paper-finger upon the carriage in a manner to permit shifting of the platen, a bracket secured to said carriage and having a pair of flanges, a leaf-spring mounted at its intermediate portion between the flanges of said bracket and with the extremities thereof projecting to contact with said carriage, a tongue projecting from the intermediate portion of said spring, said finger having a reflex bend, there being corresponding apertures in the flanges of said bracket and in said spring-tongue and in said reflex bend, the apertures in said spring-tongue and in the reflex bend of said finger being elongated to permit rocking movement of said finger against the resistance of said spring, and a pivot-screw passing through all of said apertures to retain said parts.

6. In a typewriting machine having a revoluble platen and a carriage therefor, a paper-finger mounted on said carriage having means to contact with said platen, including a loop and means to deflect hhe leading edge of a work-sheet under said finger consisting of an arched member beneath said finger connected to said loop and terminating in a. second loop secured to said finger between the extremities thereof.

7. In a typewriting machine having a revoluble platen and a carriage therefor, a folding paper-finger pivotally mounted at one extremity thereof on said carriage, including an integral strip of sheet-metal formed into a bracket at the mounted extremity, into a loop at the other extremity, and provided beneath with a concavelyarched member connected to said loop at one end thereof and bent at the other end to lllfi meet an intermediate portion of said finger.

8. In a typewriting machine having a revoluble platen and a carriage therefor, a foldingpaper-finger pivotally mounted at one extremity thereof on said carriage, including an integral strip of sheet-metal formed into a bracket at the mounted extremity and into a loop to contact with said platen at the other extremity, a concavelyarched paper-guiding rib merging at one end in said loop and bent at theother end to join an intermediate portion of said finger, and a convexly-arched intermediate member upon said paper-finger to serve as a finger-piece.

9. In a typewriting machine having a shiftable platen and a carriage therefor, a folding paper-finger arranged to contact with the platen above the printing line, means upon said carriage for resiliently mounting said finger'to permit the same to swing about a vertical axis into folded positlon, and limit means comb ned wlth sald first means to permit said finger to swing platen, and an arc ed paper-deflector 'integral with said loop and merging therewith, located beneath said finger.

11. In a typewriting' machine having a revoluble platen and a carriage therefor, a paper-finger mounted on said carriage, having means to contact with said platen, and means to deflect a leading edge of a work- Web towards said platen, including an arcuate paper-deflector supported at both extremities by said finger. v

WILLIAM F. HELMOND. 

